5 files changed, 10 insertions, 81 deletions

diff --git a/net/core/dev.c b/net/core/dev.c
index 1b09f1cae46e..91361bc2b682 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1222,64 +1222,6 @@ static inline int illegal_highdma(struct net_device *dev, struct sk_buff *skb)
 #define illegal_highdma(dev, skb)       (0)
 #endif
 
-/* Keep head the same: replace data */
-int __skb_linearize(struct sk_buff *skb, gfp_t gfp_mask)
-{
-        unsigned int size;
-        u8 *data;
-        long offset;
-        struct skb_shared_info *ninfo;
-        int headerlen = skb->data - skb->head;
-        int expand = (skb->tail + skb->data_len) - skb->end;
-
-        if (skb_shared(skb))
-                BUG();
-
-        if (expand <= 0)
-                expand = 0;
-
-        size = skb->end - skb->head + expand;
-        size = SKB_DATA_ALIGN(size);
-        data = kmalloc(size + sizeof(struct skb_shared_info), gfp_mask);
-        if (!data)
-                return -ENOMEM;
-
-        /* Copy entire thing */
-        if (skb_copy_bits(skb, -headerlen, data, headerlen + skb->len))
-                BUG();
-
-        /* Set up shinfo */
-        ninfo = (struct skb_shared_info*)(data + size);
-        atomic_set(&ninfo->dataref, 1);
-        ninfo->tso_size = skb_shinfo(skb)->tso_size;
-        ninfo->tso_segs = skb_shinfo(skb)->tso_segs;
-        ninfo->nr_frags = 0;
-        ninfo->frag_list = NULL;
-
-        /* Offset between the two in bytes */
-        offset = data - skb->head;
-
-        /* Free old data. */
-        skb_release_data(skb);
-
-        skb->head = data;
-        skb->end  = data + size;
-
-        /* Set up new pointers */
-        skb->h.raw   += offset;
-        skb->nh.raw  += offset;
-        skb->mac.raw += offset;
-        skb->tail    += offset;
-        skb->data    += offset;
-
-        /* We are no longer a clone, even if we were. */
-        skb->cloned    = 0;
-
-        skb->tail     += skb->data_len;
-        skb->data_len  = 0;
-        return 0;
-}
-
 #define HARD_TX_LOCK(dev, cpu) {                        \
         if ((dev->features & NETIF_F_LLTX) == 0) {      \
                 netif_tx_lock(dev);                     \
@@ -1326,7 +1268,7 @@ int dev_queue_xmit(struct sk_buff *skb)
 
         if (skb_shinfo(skb)->frag_list &&
             !(dev->features & NETIF_F_FRAGLIST) &&
-            __skb_linearize(skb, GFP_ATOMIC))
+            __skb_linearize(skb))
                 goto out_kfree_skb;
 
         /* Fragmented skb is linearized if device does not support SG,
@@ -1335,7 +1277,7 @@ int dev_queue_xmit(struct sk_buff *skb)
          */
         if (skb_shinfo(skb)->nr_frags &&
             (!(dev->features & NETIF_F_SG) || illegal_highdma(dev, skb)) &&
-            __skb_linearize(skb, GFP_ATOMIC))
+            __skb_linearize(skb))
                 goto out_kfree_skb;
 
         /* If packet is not checksummed and device does not support
@@ -3473,7 +3415,6 @@ subsys_initcall(net_dev_init);
 EXPORT_SYMBOL(__dev_get_by_index);
 EXPORT_SYMBOL(__dev_get_by_name);
 EXPORT_SYMBOL(__dev_remove_pack);
-EXPORT_SYMBOL(__skb_linearize);
 EXPORT_SYMBOL(dev_valid_name);
 EXPORT_SYMBOL(dev_add_pack);
 EXPORT_SYMBOL(dev_alloc_name);
diff --git a/net/decnet/dn_nsp_in.c b/net/decnet/dn_nsp_in.c
index 547523b41c81..a2ba9db1c376 100644
--- a/net/decnet/dn_nsp_in.c
+++ b/net/decnet/dn_nsp_in.c
@@ -801,8 +801,7 @@ got_it:
                  * We linearize everything except data segments here.
                  */
                 if (cb->nsp_flags & ~0x60) {
-                        if (unlikely(skb_is_nonlinear(skb)) &&
-                            skb_linearize(skb, GFP_ATOMIC) != 0)
+                        if (unlikely(skb_linearize(skb)))
                                 goto free_out;
                 }
 
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index e172cf98d7fc..5abf7057af00 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -629,8 +629,7 @@ int dn_route_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type
                         padlen);
 
         if (flags & DN_RT_PKT_CNTL) {
-                if (unlikely(skb_is_nonlinear(skb)) &&
-                    skb_linearize(skb, GFP_ATOMIC) != 0)
+                if (unlikely(skb_linearize(skb)))
                         goto dump_it;
 
                 switch(flags & DN_RT_CNTL_MSK) {
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index 8e243589045f..3ed8b57a1002 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -80,15 +80,12 @@ out:
 
 static int ipcomp_input(struct xfrm_state *x, struct sk_buff *skb)
 {
-        int err = 0;
+        int err = -ENOMEM;
         struct iphdr *iph;
         struct ip_comp_hdr *ipch;
 
-        if ((skb_is_nonlinear(skb) || skb_cloned(skb)) &&
-            skb_linearize(skb, GFP_ATOMIC) != 0) {
-                err = -ENOMEM;
+        if (skb_linearize_cow(skb))
                 goto out;
-        }
 
         skb->ip_summed = CHECKSUM_NONE;
 
@@ -158,10 +155,8 @@ static int ipcomp_output(struct xfrm_state *x, struct sk_buff *skb)
                 goto out_ok;
         }
 
-        if ((skb_is_nonlinear(skb) || skb_cloned(skb)) &&
-            skb_linearize(skb, GFP_ATOMIC) != 0) {
+        if (skb_linearize_cow(skb))
                 goto out_ok;
-        }
         
         err = ipcomp_compress(x, skb);
         iph = skb->nh.iph;
diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c
index cec3be544b69..f28cd37feed3 100644
--- a/net/ipv6/ipcomp6.c
+++ b/net/ipv6/ipcomp6.c
@@ -65,7 +65,7 @@ static LIST_HEAD(ipcomp6_tfms_list);
 
 static int ipcomp6_input(struct xfrm_state *x, struct sk_buff *skb)
 {
-        int err = 0;
+        int err = -ENOMEM;
         struct ipv6hdr *iph;
         struct ipv6_comp_hdr *ipch;
         int plen, dlen;
@@ -74,11 +74,8 @@ static int ipcomp6_input(struct xfrm_state *x, struct sk_buff *skb)
         struct crypto_tfm *tfm;
         int cpu;
 
-        if ((skb_is_nonlinear(skb) || skb_cloned(skb)) &&
-                skb_linearize(skb, GFP_ATOMIC) != 0) {
-                err = -ENOMEM;
+        if (skb_linearize_cow(skb))
                 goto out;
-        }
 
         skb->ip_summed = CHECKSUM_NONE;
 
@@ -142,10 +139,8 @@ static int ipcomp6_output(struct xfrm_state *x, struct sk_buff *skb)
                 goto out_ok;
         }
 
-        if ((skb_is_nonlinear(skb) || skb_cloned(skb)) &&
-                skb_linearize(skb, GFP_ATOMIC) != 0) {
+        if (skb_linearize_cow(skb))
                 goto out_ok;
-        }
 
         /* compression */
         plen = skb->len - hdr_len;